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Peculiarities of the potentiometric response of ISEs with membranes containing two neutral ionophores and an excess of ion-exchanger: Experiment and modeling. / Керестень, Валентина Максимовна; Попов, Андрей Юрьевич; Михельсон, Константин Николаевич.
в: Sensors and Actuators, B: Chemical, Том 417, 136090, 01.10.2024.Результаты исследований: Научные публикации в периодических изданиях › статья › Рецензирование
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TY - JOUR
T1 - Peculiarities of the potentiometric response of ISEs with membranes containing two neutral ionophores and an excess of ion-exchanger: Experiment and modeling
AU - Керестень, Валентина Максимовна
AU - Попов, Андрей Юрьевич
AU - Михельсон, Константин Николаевич
PY - 2024/10/1
Y1 - 2024/10/1
N2 - The potentiometric response of ion-selective electrodes (ISEs) with membranes simultaneously containing two ionophores: valinomycin and lithium ionophore Li VIII, as well as the cation exchanger potassium tetrakis(p-Cl-phenyl) borate in different concentrations is studied in KCl, LiCl and KCl + LiCl solutions. It is shown that ISEs with a membrane containing an excess of ionophores over the ion-exchanger provide Nernstian response to K+ and to Li+ ions. However, membranes with an excess of the ion-exchanger over valinomycin show Nernstian response to K+ only in mixed KCl + LiCl solutions with constant ratios of the concentrations of these electrolytes. On the contrary, the response to Li+ is obtained both in mixed and pure LiCl solutions. The results are semi-quantitatively explained using a simple mathematical model and respective computer simulation.
AB - The potentiometric response of ion-selective electrodes (ISEs) with membranes simultaneously containing two ionophores: valinomycin and lithium ionophore Li VIII, as well as the cation exchanger potassium tetrakis(p-Cl-phenyl) borate in different concentrations is studied in KCl, LiCl and KCl + LiCl solutions. It is shown that ISEs with a membrane containing an excess of ionophores over the ion-exchanger provide Nernstian response to K+ and to Li+ ions. However, membranes with an excess of the ion-exchanger over valinomycin show Nernstian response to K+ only in mixed KCl + LiCl solutions with constant ratios of the concentrations of these electrolytes. On the contrary, the response to Li+ is obtained both in mixed and pure LiCl solutions. The results are semi-quantitatively explained using a simple mathematical model and respective computer simulation.
KW - Computer simulations
KW - Excess of ion-exchanger
KW - Ion-selective electrodes
KW - Potentiometric measurements
KW - Two ionophores in membrane
UR - https://www.mendeley.com/catalogue/213da933-5fdf-3440-92ef-e22121a5de61/
U2 - 10.1016/j.snb.2024.136090
DO - 10.1016/j.snb.2024.136090
M3 - Article
VL - 417
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
M1 - 136090
ER -
ID: 120307695